Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Holographic digital watermark










Image Number 5 for United States Patent #7551750.

A digital watermark which is incorporated, perceptibly or imperceptibly, into a diffractive device such as a hologram. When applied to protect and/or authenticate a document of value or a product, the device provides an increased degree of overt and covert security, and permits tracking of the sale, use or other parameters associated with the product and/or document of value.








 
 
  Recently Added Patents
Device and method for unified codes
Non-phosphorus-based gellant for hydrocarbon fluids
Die packages and systems having the die packages
Reovirus for the treatment of cellular proliferative disorders
Systems and methods for facilitating communication with foundation fieldbus linking devices
Electronic control apparatus
Power converter with a variable reference voltage and inrush current limiting
  Randomly Featured Patents
Dental implant analog sleeve
Totem pole mixer having grounded serially connected stacked FET pair
Color changing cleansing composition
Phase-separated, epitaxial composite cap layers for electronic device applications and method of making the same
Grass growing
Lathe work centers
Ambient light calibration for energy efficiency in display systems
Electrically assisted variable-K control
Efficient system and method for measuring target characteristics via a beam of electromagnetic energy
Disposable wiper dispenser carton